#include <Adafruit_LiquidCrystal.h>
#include "DHT.h"
Adafruit_LiquidCrystal lcd(0);
const char* sta;
DHT dht(6, DHT11);

int trigPin = 12;
int echoPin = 13;
long duration;
long distance;
int sensePin = A1; //This is the Arduino Pin that will read the sensor output
int sensorInput; //The variable we will use to store the sensor input
double temp; //The variable we will use to store temperature in degrees.
double humi;
int ledPin = 11;
int analogPin = A0;
int val = 0;
int btpin;
int ultrasonic;
int temp1;
int humi1;
int light;
int bt;
int btval = 0;
int Val;

int readUltrasonicDistance()
{
    digitalWrite(trigPin, LOW); 
    delayMicroseconds(5); 
    digitalWrite(trigPin, HIGH); 
    delayMicroseconds(5); 
    digitalWrite(trigPin, LOW); //ใช้งานขา trig
    duration = pulseIn(echoPin, HIGH); //อ่านค่าของ echo
    distance = (duration/2) / 29.1; //คำนวณเป็น centimeters
    Serial.print(distance); 
    Serial.println(" cm");
    if (distance <= 250)
    {
     	digitalWrite(10, HIGH);
    }
  	else
    {
     	digitalWrite(10, LOW); 
    }
}
int tempreader()
{
	  temp = dht.readTemperature();
    Serial.print("Current Temperature: ");
    Serial.println(temp);
    return temp;
}
int humireader()
{	
  	humi = dht.readHumidity();
  	Serial.print("Current Humidity: ");
    Serial.println(humi);
  	return humi;
}
int ldrreader()
{
    val = analogRead(analogPin);
    Serial.print("val = ");
    Serial.println(val);
    if (val < 500) {
        digitalWrite(ledPin, HIGH);
        Serial.println("LED ON");
        Serial.println();
    }
    else {
        digitalWrite(ledPin, LOW);
        Serial.println("LED OFF");
        Serial.println();
    }
    delay(100);
}
int botton()
{
    btpin = digitalRead(9);
  	btval = btval + btpin;
  	Val = btval%2;
    if (Val == 0){
        digitalWrite(7, HIGH); // Pin 7 used to control something
    } 
    else 
    {
        digitalWrite(7, LOW);
    }
}
void setup() {
  	lcd.begin(16, 2);
    
    pinMode(echoPin, INPUT); //สั่งให้ขา echo ใช้งานเป็น input
    pinMode(trigPin, OUTPUT); //สั่งให้ขา trig ใช้งานเป็น output
    pinMode(10, OUTPUT);
    pinMode(analogPin, INPUT);
    pinMode(ledPin, OUTPUT);
    pinMode(9, INPUT);
    pinMode(7, OUTPUT);
  	dht.begin();
}
void loop()
{
    readUltrasonicDistance();
    temp1 = tempreader();
  	humi1 = humireader();
  	ldrreader();
    botton();
	  Serial.begin(9600);
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("temp = ");
    lcd.print(temp1);
    lcd.print(" c");
  	delay(10);
 	  lcd.setCursor(0, 1);
  	lcd.print("humi = ");
    lcd.print(humi1);
    lcd.print(" %");
    delay(600);
}